milldust
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dust — {{11}}dust (n.) O.E. dust, from P.Gmc. *dunstaz (Cf. O.H.G. tunst storm, breath, Ger. Dunst mist, vapor, Dan. dyst milldust, Du. duist), from PIE *dheu (1) dust, smoke, vapor (Cf. Skt. dhu shake, L. fumus … Etymology dictionary